A heat dissipation control method for a shunt, a shunt, and a computer-readable storage medium

Abstract

This invention relates to the field of temperature control technology, and more particularly to a heat dissipation control method for a shunt, a shunt, and a computer-readable storage medium. The shunt includes a shunt itself, a liquid cooling pipe, and a liquid cooling source, forming a liquid cooling circuit between the liquid cooling pipe and the liquid cooling source. The liquid cooling source flows through the shunt and a battery pack monitored by the shunt via the liquid cooling circuit. An electronic valve is installed at the outlet of the liquid cooling source. The heat dissipation control method for the shunt includes: acquiring the temperature value of the shunt; determining a target opening degree of the electronic valve based on the temperature value when the temperature value is greater than a preset temperature threshold; and controlling the opening degree of the electronic valve to adjust to the target opening degree. This invention aims to solve the problem of simultaneously controlling the temperature of a shunt and a battery pack.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology, and in particular to a heat dissipation control method for a shunt, a shunt, and a computer-readable storage medium. Background Technology

[0002] In the battery management system of new energy vehicles, in order to make the electrical energy generated by the car battery effective, a shunt is usually used to distribute the battery's electrical energy to different power systems and equipment, ensuring that the battery's electrical energy can be used and utilized effectively.

[0003] However, the heat generated by the batteries of new energy vehicles during operation not only affects the battery's durability but also conducts to the shunt, causing the shunt's temperature to rise. This leads to a change in the shunt's resistance and a temperature drift phenomenon, which in turn reduces the shunt's detection accuracy during use. Therefore, a solution that can simultaneously address battery heat dissipation and shunt cooling is needed.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a heat dissipation control method for a shunt, which aims to solve the problem of how to simultaneously cool down the shunt and the battery pack.

[0006] To achieve the above objectives, the present invention provides a heat dissipation control method for a shunt, the method comprising:

[0007] Obtain the temperature value of the shunt;

[0008] When the temperature value is greater than a preset temperature threshold, the target opening degree of the electronic valve is determined based on the temperature value;

[0009] The opening degree of the electronic valve is adjusted to the target opening degree.

[0010] Optionally, the step of determining the target opening degree of the electronic valve based on the temperature value includes:

[0011] Determine the temperature difference between the temperature value and the preset temperature threshold;

[0012] The target opening degree of the electronic valve is determined based on the temperature difference, wherein the absolute value of the temperature difference is positively correlated with the target opening degree.

[0013] Optionally, determining the target opening degree of the electronic valve based on the temperature difference includes:

[0014] Determine whether the absolute value of the temperature difference at the current moment is greater than a preset temperature difference threshold;

[0015] If so, the maximum opening degree corresponding to the electronic valve is determined as the target opening degree;

[0016] Otherwise, determine the temperature difference range in which the temperature difference is located, and determine the preset opening value corresponding to the temperature difference range as the target opening.

[0017] Optionally, before the step of adjusting the opening degree of the electronic valve to the target opening degree, the method further includes:

[0018] Obtain the temperature value of the battery pack;

[0019] Determine the temperature difference between the temperature value of the shunt and the temperature value of the battery pack;

[0020] Based on the temperature difference, determine the thermal balance value between the shunt and the battery pack;

[0021] When the thermal balance value is within the preset thermal balance range, the step of adjusting the opening of the electronic valve to the target opening is executed;

[0022] Otherwise, the opening degree of the electronic valve is controlled based on a preset thermal balance adjustment strategy.

[0023] Optionally, controlling the opening degree of the electronic valve based on a preset thermal balance adjustment strategy includes the following steps:

[0024] Based on the heat balance value, determine the valve closing time corresponding to the electronic valve;

[0025] The control parameters of the electronic valve are determined based on the valve closing time.

[0026] The electronic valve is controlled to operate according to the control parameters so that the electronic valve returns to its opening degree before closing after the valve closing time.

[0027] Optionally, the liquid cooling source includes a first source port and a second source port, a first electronic valve is provided at the first source port, and a second electronic valve is provided at the second source port. The step of controlling the opening degree of the electronic valve to adjust to the target opening degree includes:

[0028] Obtain the ambient temperature of the battery pack;

[0029] When the ambient temperature is greater than the first preset ambient temperature threshold, the opening degree of the first electronic valve is controlled to be adjusted to the target opening degree so that the coolant in the liquid cooling source flows through the battery pack first and then through the distributor.

[0030] When the ambient temperature is less than the second preset ambient temperature threshold, the opening degree of the second electronic valve is adjusted to the target opening degree so that the coolant in the liquid cooling source flows through the distributor first and then through the battery pack.

[0031] Optionally, the step of controlling the opening degree of the electronic valve to adjust to the target opening degree includes:

[0032] Obtain a preset opening increment, and adjust the current opening of the electronic valve according to the preset opening increment until the current opening of the electronic valve is adjusted to the target opening; or,

[0033] Obtain a preset adjustment rate, and adjust the current opening of the electronic valve to the target opening according to the preset adjustment rate.

[0034] Optionally, the liquid cooling source further includes a liquid inlet and a refrigeration device, wherein the coolant in the liquid cooling source flows back to the liquid cooling source through the liquid inlet, and the heat dissipation control method of the distributor further includes:

[0035] Obtain the inlet temperature of the liquid cooling pipe;

[0036] When the inlet water temperature is greater than the preset inlet water temperature threshold, the refrigeration device is controlled to operate at the target power.

[0037] When the inlet water temperature is less than or equal to the preset inlet water temperature threshold, the refrigeration device is controlled to stop operating;

[0038] Alternatively, obtain the inlet temperature and / or outlet temperature of the liquid cooling pipe in the battery pack;

[0039] When the inlet temperature and / or the outlet temperature are greater than the preset inlet and outlet temperature thresholds, the refrigeration device is controlled to operate at the target power.

[0040] When both the inlet temperature and the outlet temperature are less than or equal to the preset inlet and outlet temperature thresholds, the refrigeration device is controlled to stop operating.

[0041] In addition, to achieve the above objectives, the present invention also provides a shunt, the shunt comprising: a memory, a processor, and a shunt heat dissipation control program stored in the memory and executable on the processor, wherein the shunt heat dissipation control program, when executed by the processor, implements the steps of the shunt heat dissipation control method as described above.

[0042] In addition, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a heat dissipation control program for a shunt, wherein when the heat dissipation control program for the shunt is executed by a processor, the heat dissipation control program for the shunt implements the steps of the heat dissipation control method for the shunt as described above.

[0043] This invention provides a heat dissipation control method for a shunt, a shunt, and a computer-readable storage medium. A liquid cooling circuit is formed between the liquid cooling pipe and the liquid cooling source of the shunt. The liquid cooling source flows through the shunt and the battery pack monitored by the shunt via the liquid cooling circuit. An electronic valve is installed at the outlet of the liquid cooling source. When the temperature of the shunt is detected to be too high, the target opening degree of the electronic valve is determined based on the temperature of the shunt, and the electronic valve is controlled to open at the target opening degree. Coolant in the liquid cooling source flows out from the liquid cooling source and flows through the liquid cooling circuit through the shunt and the battery pack to cool down the shunt and the battery pack. This achieves simultaneous cooling and heat dissipation of the battery pack and the shunt, avoiding the rapid rise in temperature of the shunt which may cause temperature drift, and also preventing the battery pack from overheating and damaging its internal components. In addition, the liquid cooling pipe between the shunt and the battery pack is used to separate them, which reduces the heat transfer rate from the battery pack to the shunt to some extent, thus preventing the shunt from experiencing temperature drift due to rapid temperature rise. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the hardware operating environment of the shunt involved in an embodiment of the present invention;

[0045] Figure 2 This is a flowchart illustrating the first embodiment of the heat dissipation control method for the shunt of the present invention;

[0046] Figure 3 This is a flowchart illustrating a second embodiment of the heat dissipation control method for the shunt of the present invention;

[0047] Figure 4 This is a flowchart illustrating the third embodiment of the heat dissipation control method for the shunt of the present invention;

[0048] Figure 5 This is a flowchart illustrating the fourth embodiment of the heat dissipation control method for the shunt of the present invention;

[0049] Figure 6 This is a schematic diagram illustrating the positional relationship between the shunt and the battery pack in an embodiment of the present invention.

[0050] Figure 7 This is a flowchart illustrating the fourth embodiment of the heat dissipation control method for the shunt of the present invention;

[0051] Figure 8 This is a flowchart illustrating the fifth embodiment of the heat dissipation control method for the shunt of the present invention.

[0052] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] In this application, the distributor includes a liquid cooling pipe and a liquid cooling source, forming a liquid cooling circuit between the liquid cooling pipe and the liquid cooling source. The liquid cooling source flows through the distributor and the battery pack monitored by the distributor through the liquid cooling circuit. An electronic valve is provided at the outlet of the liquid cooling source. After the electronic valve is opened, the coolant in the liquid cooling source flows out from the liquid cooling source and flows through the distributor and the battery pack through the liquid cooling circuit to conduct heat and cool down the distributor and the battery pack. This prevents the distributor temperature from becoming too high, which would reduce the distributor detection accuracy, and also prevents the battery pack temperature from becoming too high, which would cause the battery pack to overheat.

[0054] To better understand the above technical solutions, exemplary embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0055] As one implementation scheme, Figure 1 This is a schematic diagram of the hardware operating environment of the shunt involved in the embodiment of the present invention.

[0056] like Figure 1 As shown, the splitter may include: a processor 1001, such as a CPU; a memory 1005; a user interface 1003; a network interface 1004; and a communication bus 1002. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0057] Those skilled in the art will understand that Figure 1 The architecture of the splitter shown does not constitute a limitation on the splitter and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0058] like Figure 1As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a heat dissipation control program for the power shunt. The operating system is a program that manages and controls the hardware and software resources of the power shunt, the heat dissipation control program for the power shunt, and the operation of other software or programs.

[0059] exist Figure 1 In the power splitter shown, the user interface 1003 is mainly used to connect to the terminal and communicate with the terminal; the network interface 1004 is mainly used to communicate with the backend server; and the processor 1001 can be used to call the heat dissipation control program of the power splitter stored in the memory 1005.

[0060] In this embodiment, the shunt includes: a memory 1005, a processor 1001, and a heat dissipation control program for the shunt stored in the memory and executable on the processor, wherein:

[0061] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0062] Obtain the temperature value of the shunt;

[0063] When the temperature value is greater than a preset temperature threshold, the target opening degree of the electronic valve is determined based on the temperature value;

[0064] The opening degree of the electronic valve is adjusted to the target opening degree.

[0065] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0066] Determine the temperature difference between the temperature value and the preset temperature threshold;

[0067] The target opening degree of the electronic valve is determined based on the temperature difference, wherein the absolute value of the temperature difference is positively correlated with the target opening degree.

[0068] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0069] Determine whether the absolute value of the temperature difference at the current moment is greater than a preset temperature difference threshold;

[0070] If so, the maximum opening degree corresponding to the electronic valve is determined as the target opening degree;

[0071] Otherwise, determine the temperature difference range in which the temperature difference is located, and determine the preset opening value corresponding to the temperature difference range as the target opening.

[0072] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0073] Obtain the temperature value of the battery pack;

[0074] Determine the temperature difference between the temperature value of the shunt and the temperature value of the battery pack;

[0075] Based on the temperature difference, determine the thermal balance value between the shunt and the battery pack;

[0076] When the thermal balance value is within the preset thermal balance range, the step of adjusting the opening of the electronic valve to the target opening is executed;

[0077] Otherwise, the opening degree of the electronic valve is controlled based on a preset thermal balance adjustment strategy.

[0078] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0079] Based on the heat balance value, determine the valve closing time corresponding to the electronic valve;

[0080] The control parameters of the electronic valve are determined based on the valve closing time.

[0081] The electronic valve is controlled to operate according to the control parameters so that the electronic valve returns to its opening degree before closing after the valve closing time.

[0082] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0083] Obtain the inlet temperature of the liquid cooling pipe;

[0084] When the inlet water temperature is greater than the preset inlet water temperature threshold, the refrigeration device is controlled to operate at the target power.

[0085] When the inlet water temperature is less than or equal to the preset inlet water temperature threshold, the refrigeration device is controlled to stop operating.

[0086] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0087] Obtain a preset opening increment, and adjust the current opening of the electronic valve according to the preset opening increment until the current opening of the electronic valve is adjusted to the target opening; or,

[0088] Obtain a preset adjustment rate, and adjust the current opening of the electronic valve to the target opening according to the preset adjustment rate.

[0089] When processor 1001 calls the shunt heat dissipation control program stored in memory 1005, it performs the following operations:

[0090] Obtain the inlet temperature of the liquid cooling pipe;

[0091] When the inlet water temperature is greater than the preset ambient temperature threshold, the refrigeration device is controlled to operate at the target power.

[0092] When the inlet water temperature is less than or equal to the preset ambient temperature threshold, the refrigeration device is controlled to stop operating;

[0093] Alternatively, obtain the inlet temperature and / or outlet temperature of the liquid cooling pipe in the battery pack;

[0094] When the inlet temperature and / or the outlet temperature are greater than the preset inlet and outlet temperature thresholds, the refrigeration device is controlled to operate at the target power.

[0095] When both the inlet temperature and the outlet temperature are less than or equal to the preset inlet and outlet temperature thresholds, the refrigeration device is controlled to stop operating.

[0096] Based on the hardware architecture of the current splitter based on temperature control technology described above, an embodiment of the heat dissipation control method of the current splitter of the present invention is proposed.

[0097] Reference Figure 2 In this embodiment, the heat dissipation control method of the shunt includes the following steps:

[0098] Step S10: Obtain the temperature value of the shunt;

[0099] In this embodiment, the temperature value of the shunt is first obtained.

[0100] As an optional implementation, a temperature sensor can be installed on the side of the shunt near the liquid cooling pipe. The heat generated by the battery pack during operation is conducted to the shunt, causing the shunt temperature to rise. The temperature sensor can collect temperature data and detect temperature changes in a timely manner. The temperature value on the shunt is determined based on the temperature data collected by the temperature sensor.

[0101] Step S20: When the temperature value of the distributor is greater than the preset temperature threshold, determine the target opening degree of the electronic valve based on the temperature value of the distributor.

[0102] Step S30: Control the opening degree of the electronic valve to adjust to the target opening degree.

[0103] In this embodiment, when the detected temperature value is greater than the preset temperature threshold, it means that the temperature on the distributor is too high. It is necessary to control the electronic valve at the liquid coolant outlet to open, so that the coolant flows through the liquid cooling circuit through the distributor. The coolant absorbs the heat on the distributor through heat conduction, thereby cooling the distributor.

[0104] In this embodiment, the preset temperature threshold is characterized as the temperature threshold at which the shunt will not exhibit temperature drift. Optionally, the preset temperature threshold can be set within the range of [40°C, 50°C].

[0105] In this embodiment, in order to ensure the cooling effect of the coolant on the distributor, the electronic valve is opened at different opening degrees, so that the coolant in the liquid cooling source flows out from the outlet at different flow rates. The cooling rate achieved by the coolant at different flow rates is different. The faster the flow rate, the faster the cooling rate. When the electronic valve is opened at its maximum opening degree, the coolant flow rate is the maximum and the cooling rate is the maximum.

[0106] As an alternative implementation, in order to ensure cooling efficiency, the temperature of the coolant in the liquid cooling source can be set within the temperature range of [15℃, 25℃].

[0107] It should be noted that in this embodiment, when the heat from the battery pack is transferred to the shunt, causing the shunt temperature to rise above a preset temperature threshold, the electronic valve will immediately open to a preset initial opening. Since it takes a certain time interval for the coolant to flow to the shunt to cool it down, and during this process, the temperature value on the shunt will continue to change with an increasing trend, the target opening of the electronic valve is determined based on the changing temperature value, and the opening of the electronic valve is controlled to be adjusted to the target opening.

[0108] During this process, the target opening of the electronic valve will be continuously adjusted according to the change of temperature value until the temperature value of the distributor is lower than the preset temperature threshold, at which point it is determined that the distributor is in the temperature range where temperature drift will not occur.

[0109] In addition, it should be noted that in this embodiment, the other side of the liquid cooling circuit is in close contact with the battery pack. When the coolant flows through the separator through the liquid cooling circuit, it will also flow through the battery pack. That is, the coolant can absorb some of the heat generated by the battery pack through the liquid cooling circuit, thereby achieving heat dissipation for the battery pack.

[0110] In the technical solution provided in this embodiment, a liquid cooling circuit is formed between the liquid cooling pipe of the distributor and the liquid cooling source. One side of the liquid cooling circuit is in close contact with the distributor, and the other side is in close contact with the battery pack. An electronic valve is installed at the outlet of the liquid cooling source. When the temperature of the distributor is detected to be too high, the target opening degree of the electronic valve is determined according to the temperature value of the distributor, and the electronic valve is controlled to open at the target opening degree. The coolant in the liquid cooling source flows out from the liquid cooling source and flows through the liquid cooling circuit to the distributor and the battery pack, cooling both the distributor and the battery pack. This achieves simultaneous cooling and heat dissipation for both the battery pack and the distributor, avoiding the potential temperature drift phenomenon caused by a rapid increase in the distributor temperature, and also preventing the battery pack from overheating and damaging its internal components. In addition, since a liquid cooling pipe is installed between the distributor and the battery pack to separate them, the heat transfer rate from the battery pack to the distributor is reduced to a certain extent, which also helps to prevent the distributor from experiencing temperature drift due to a rapid increase in temperature.

[0111] Furthermore, in this embodiment, when the current temperature value of the distributor is detected to be less than the temperature threshold, it is determined that the distributor is in a temperature range where temperature drift will not occur. The electronic valve is then closed to stop the coolant from flowing out of the liquid cooling source, thus avoiding excessive cooling of the distributor.

[0112] In the technical solution provided in this embodiment, the temperature of the shunt may be too low, which may also cause temperature drift. Therefore, when the current temperature value of the shunt is less than the preset temperature threshold, the electronic valve should be closed to prevent the temperature of the shunt from continuing to drop, so that the shunt can be stabilized at a temperature below the preset temperature threshold.

[0113] Reference Figure 3 In the second embodiment, based on the first embodiment, step S20 includes:

[0114] Step S21: Determine the temperature difference between the temperature value and the preset temperature threshold;

[0115] Step S22: Determine the target opening degree of the electronic valve based on the temperature difference, wherein the absolute value of the temperature difference is positively correlated with the target opening degree.

[0116] As an optional embodiment, in this embodiment, if the temperature value of the distributor is higher than the preset temperature threshold, the greater the temperature difference between the temperature value and the preset temperature threshold, the greater the target opening degree of the electronic valve.

[0117] Optionally, in some implementations, the target opening value can be determined by looking up a table. In another optional implementation, a mapping function between temperature difference and target opening can be constructed, with the temperature difference as the independent variable, to determine the target opening value as the dependent variable.

[0118] In the technical solution provided in this embodiment, the target opening value is determined based on the temperature difference between the temperature value of the distributor and the preset temperature threshold, and the target opening of the electronic valve is determined based on the amount by which the distributor exceeds the preset temperature threshold, so as to avoid the temperature drift phenomenon caused by the excessive temperature change rate of the distributor.

[0119] Furthermore, in this embodiment, step S22 includes:

[0120] Step S221: Determine whether the absolute value of the temperature difference at the current moment is greater than a preset temperature difference threshold.

[0121] Step S222: If yes, determine the maximum opening degree corresponding to the electronic valve as the target opening degree;

[0122] Step S223: Otherwise, determine the temperature difference range in which the temperature difference is located, and determine the preset opening value corresponding to the temperature difference range as the target opening.

[0123] Optionally, in this embodiment, when the absolute value of the temperature difference between the temperature value and the preset temperature threshold is greater than the preset temperature difference threshold, it means that the heating rate of the distributor is too high. Then, the maximum opening degree corresponding to the electronic valve is determined as the target opening degree, so that the coolant flows out of the liquid cooling source at the fastest flow rate, thereby neutralizing the heat transferred from the battery pack and slowing down the temperature change rate of the distributor.

[0124] For example, suppose the current temperature value of the shunt is T = 45℃, the preset temperature threshold is T0 = 40℃, the preset temperature difference threshold is 3℃, and the opening range of the electronic valve is 0 (completely closed) to 100 (completely open). The opening corresponding to the maximum temperature difference is 100 (that is, the electronic valve is fully open when the temperature difference is the maximum).

[0125] First, determine the temperature difference ΔT: ΔT = T - T0 = 5℃.

[0126] Then, the target opening degree P is determined based on the temperature difference ΔT. The opening degree value corresponding to different temperature differences can be obtained by looking up a table. See the table below for the opening degree values ​​and temperature differences:

[0127] ΔT≥3 100 ΔT=2 70 ΔT=1 50

[0128] At this point, the temperature difference ΔT between the temperature value of the distributor and the preset temperature threshold is 5 > 3. Therefore, the target opening value is set to 100, that is, the opening value of the control electronic valve is adjusted to the maximum opening value to achieve the fastest cooling of the distributor.

[0129] Next, when the temperature difference of the shunt gradually decreases to below 3 degrees Celsius during the cooling process, the opening value is gradually reduced to decrease the cooling rate and maintain the temperature of the shunt within the preset temperature threshold.

[0130] In the technical solution provided in this embodiment, when the heating rate of the distributor is too high, the maximum opening degree corresponding to the electronic valve is determined as the target opening degree, so that the coolant flows out of the liquid cooling source at the fastest flow rate, thereby slowing down the temperature change rate of the distributor and making the cooling rate of the distributor relatively uniform, avoiding temperature drift due to excessive temperature change rate and damage to the components of the distributor.

[0131] Reference Figure 4 In the third embodiment, based on any embodiment, before step S20, the method further includes:

[0132] Step S50: Obtain the temperature value of the battery pack;

[0133] Step S60: Determine the temperature difference between the temperature value of the shunt and the temperature value of the battery pack;

[0134] Step S70: Determine the thermal balance value between the shunt and the battery pack based on the temperature difference;

[0135] Step S80: When the thermal balance value is within the preset thermal balance range, execute the step of controlling the opening degree of the electronic valve to adjust to the target opening degree;

[0136] Step S90: Otherwise, control the opening degree of the electronic valve based on a preset thermal balance adjustment strategy.

[0137] As an optional embodiment, in this embodiment, due to the inconsistent cooling rates between the battery pack and the shunt under the same electronic valve opening during the cooling process, relevant personnel found during testing that when the temperature difference between the battery pack and the shunt is large (usually exceeding 5°C), the excessive thermal balance between the battery pack and the shunt can cause abnormal shunt operation when shunting the electrical energy generated by the battery pack. Therefore, to avoid this problem, this embodiment calculates the thermal balance value between the shunt and the battery pack and adjusts the opening of the electronic valve to balance the temperature values ​​between the shunt and the battery pack during the cooling process.

[0138] As an alternative implementation, the temperature value of the battery pack can be obtained by setting a temperature sensor on the side of the battery pack near the liquid cooling pipe, and determining the temperature value of the battery pack based on the temperature data collected by the temperature sensor.

[0139] In this embodiment, the thermal balance value is a quantitative value reflecting the degree of temperature deviation between the battery pack and the shunt. When the thermal balance value is within the thermal balance range, it indicates that the temperature deviation between the battery pack and the shunt will not cause an abnormal power shunting in the shunt. In this case, the valve of the liquid cooling source is kept open to maintain the current cooling rate. However, when the thermal balance value is not within the thermal balance range, it means that there is a risk of an abnormal power shunting in the shunt. Therefore, a thermal balance adjustment strategy is needed to control the opening of the electronic valve.

[0140] As an optional implementation, the preset thermal balance range is calculated as follows: Testers continuously increase the temperature difference between the test battery pack and the shunt, recording whether the energy distribution of the battery pack is abnormal under different temperature differences. The temperature difference value corresponding to the abnormal energy distribution is determined as the thermal balance range. Specifically, at the upper limit of the thermal balance range, the temperature difference between the battery pack and the shunt is positive (i.e., the battery pack temperature is higher than the shunt temperature), and at the lower limit of the thermal balance range, the temperature difference is negative (i.e., the battery pack temperature is lower than the shunt temperature).

[0141] It should be noted that, generally speaking, the temperature of the battery pack is higher than that of the shunt. However, in some extreme cases, such as when the firmware in the shunt malfunctions and causes a short circuit in the circuit of the shunt, the shunt itself may also have a heat source and cause its temperature to rise. In this case, the temperature of the battery pack may be lower than that of the shunt. Considering this situation, a lower limit of the thermal balance range is also set in this embodiment.

[0142] In the technical solution provided in this embodiment, by setting a thermal balance range and calculating whether the thermal balance value between the battery pack and the shunt is within the thermal balance range, the temperature difference between the battery pack and the shunt is avoided to be too large, thereby ensuring that the shunt can shunt the power generated by the battery pack normally.

[0143] Furthermore, in this embodiment, step S90 includes:

[0144] Step S91: Determine the valve closing time corresponding to the electronic valve based on the heat balance value;

[0145] Step S92: Determine the control parameters of the electronic valve based on the valve closing time;

[0146] Step S93: Control the electronic valve to operate according to the control parameters so that the electronic valve returns to the opening degree before closing after the valve closing time.

[0147] Optionally, in this embodiment, when the thermal balance value is not in the thermal balance range, the electronic valve is closed for a certain period of time, that is, the cooling is paused for a period of time, so that the heat between the battery pack and the shunt is balanced, thereby reducing the temperature difference between the battery pack and the shunt.

[0148] Optionally, regarding how to determine the valve closing time of the electronic valve based on the heat balance value, when the heat balance value is above the upper limit of the heat balance range, the larger the heat balance value, the longer the valve closing time; when the heat balance value is below the lower limit of the heat balance range, the smaller the heat balance value, the longer the valve closing time.

[0149] Optionally, to determine the valve closing time of the electronic valve based on the thermal balance value, the tester pre-tests the time it takes for the thermal balance value to recover to the thermal balance range under different valve closing times to construct a linear mapping relationship, as shown in the following functional relationship:

[0150] F(HB)=t

[0151] Where HB is the thermal balance value and t is the valve closing time.

[0152] Furthermore, in this embodiment, the corresponding control parameters of the electronic valve are determined based on the valve closing time. These control parameters include the valve closing time, the initial valve opening value before closing, and the valve closing control signal. The distributor sends the control parameters to the control unit in the electronic valve. The control unit closes the valve according to the valve closing control signal, maintains the valve closing time, and then controls the valve opening to return to its initial value.

[0153] In the technical solution provided in this embodiment, when the thermal balance value is not in the thermal balance range, the electronic valve is closed for a certain period of time, that is, the cooling is paused for a period of time, so that the heat between the battery pack and the shunt is balanced, thereby reducing the temperature difference between the battery pack and the shunt.

[0154] Reference Figure 5 In the fourth embodiment, based on any embodiment, step S30 further includes:

[0155] Step S31: Obtain the ambient temperature of the battery pack;

[0156] Step S32: When the ambient temperature is greater than the first preset ambient temperature threshold, control the opening degree of the first electronic valve to adjust to the target opening degree so that the coolant in the liquid cooling source flows through the battery pack first and then through the distributor.

[0157] Step S33: When the ambient temperature is less than the second preset ambient temperature threshold, control the opening degree of the second electronic valve to adjust to the target opening degree so that the coolant in the liquid cooling source flows through the distributor first and then through the battery pack.

[0158] As an optional embodiment, when the ambient temperature of the environment where the battery pack is located is too high or too low, the battery pack will not be able to work properly. In order to avoid the temperature difference between the battery pack and the shunt being too large, this embodiment sets two different coolant flow modes according to the different ambient temperatures of the battery pack.

[0159] See Figure 6 The diagram shows the structural relationship between another shunt and the battery pack. The liquid cooling source includes a first source port and a second source port. A first electronic valve is installed at the first source port, and a second electronic valve is installed at the second source port. When the ambient temperature of the environment where the battery pack is located is too high, the opening of the first valve is controlled so that the coolant in the liquid cooling source flows through the battery pack first and then through the shunt. In this way, the coolant comes into contact with the battery pack first and absorbs the heat generated on the battery pack through heat conduction, thereby achieving a cooling effect on the battery pack.

[0160] Similarly, refer to Figure 6 When the ambient temperature of the environment where the battery pack is located is too low, the opening of the second valve is controlled so that the coolant in the liquid cooling source flows through the distributor first and then through the battery pack. In this way, the coolant first comes into contact with the distributor with a higher temperature and absorbs the heat generated on the distributor through heat conduction. After the coolant temperature rises, it flows through the battery pack, achieving the heating effect on the battery pack.

[0161] To further illustrate its effectiveness, the following is an illustrative application scenario of this solution, taking an electric vehicle as an example. When the electric vehicle is started in a relatively cold environment, the ambient temperature around the battery pack is low. To ensure the battery operates normally, the temperature of the battery pack needs to be raised to a temperature range suitable for normal operation. At this time, the second valve is opened to heat the battery pack. However, after the electric vehicle has been running for a period of time, the ambient temperature around the battery pack rises above a certain threshold due to the heat dissipated from prolonged operation. In this case, the first valve is opened to cool the battery pack.

[0162] In the technical solution provided in this embodiment, by setting two electronic valves, the liquid in the liquid cooling source flows out from different directions to contact the battery pack and the shunt in different sequences, thereby avoiding excessive temperature difference between the battery pack and the shunt while achieving the effect of heating or cooling the battery pack.

[0163] Reference Figure 7 In the fifth embodiment, based on any embodiment, step S30 further includes:

[0164] Step S34: Obtain a preset opening increment, and adjust the current opening of the electronic valve according to the preset opening increment until the current opening of the electronic valve is adjusted to the target opening.

[0165] Alternatively, in step S35, a preset adjustment rate is obtained, and the current opening of the electronic valve is adjusted to the target opening according to the preset adjustment rate.

[0166] As an optional embodiment, in order to avoid the electronic valve opening degree being adjusted too quickly, which would cause the battery pack, liquid cooling pipe, and shunt to change temperature too quickly in a short period of time and thus damage the devices, this embodiment provides two different opening condition modes.

[0167] 1. Gradually increase the opening to the target opening based on a certain increment.

[0168] Specifically, a preset opening increment is used, causing the electronic valve to increase its opening by the increment value at preset time intervals until the target opening is reached. During this process, the flow rate in the coolant gradually increases to the flow rate corresponding to the target opening, and the cooling rate of the distributor and battery pack also gradually increases.

[0169] Second, gradually increase the opening to the target opening based on a certain adjustment rate.

[0170] Specifically, a preset adjustment rate is used to uniformly adjust the electronic valve to the corresponding target opening. During this process, the flow rate in the coolant also gradually increases to the flow rate corresponding to the target opening, and the cooling rate of the distributor and battery pack also gradually increases.

[0171] In the technical solution provided in this embodiment, by adjusting the opening value at a constant speed or by a constant increment, the valve opening of the electronic valve is not adjusted too quickly, which would cause the temperature of the battery pack, liquid cooling pipe, and shunt to change too quickly in a short period of time, resulting in damage to the devices.

[0172] Reference Figure 8 In the sixth embodiment, based on any embodiment, the liquid cooling source in the distributor further includes a liquid inlet and a cooling device, and the coolant in the liquid cooling source flows back to the liquid cooling source through the liquid inlet. The heat dissipation control method of the distributor further includes:

[0173] Step S100: Obtain the inlet temperature of the liquid cooling pipe;

[0174] Step S110: When the inlet water temperature is greater than the preset inlet water temperature threshold, control the refrigeration device to operate at the target power.

[0175] Step S120: When the inlet water temperature is less than or equal to the preset inlet water temperature threshold, control the refrigeration device to stop operating.

[0176] As an optional embodiment, in this embodiment, when the coolant flows back to the liquid cooling source through the inlet, the temperature of the coolant will rise after absorbing heat. In order to ensure the cooling effect of the coolant, a refrigeration device is also provided in the liquid cooling source to cool the coolant in the liquid cooling source.

[0177] Optionally, the inlet temperature of the liquid cooling pipe can be obtained by installing a temperature sensor at the inlet.

[0178] Optionally, the inlet temperature threshold can be set to the initial temperature of the coolant. When the ambient temperature in the liquid cooling source is higher than this initial temperature value, the refrigeration unit is controlled to operate at a preset target power, and then stops operating after the ambient temperature is reduced to below the ambient temperature threshold.

[0179] Alternatively, the inlet temperature threshold can be set slightly lower than the initial temperature of the coolant. For example, if the initial temperature of the coolant is 25°C, then the inlet temperature threshold would be 24°C.

[0180] Furthermore, in this embodiment, the heat dissipation control method for the shunt also includes:

[0181] Step S101: Obtain the inlet temperature and / or outlet temperature of the liquid cooling pipe in the battery pack;

[0182] Step S111: When the inlet temperature and / or the outlet temperature are greater than the preset inlet and outlet temperature thresholds, control the refrigeration device to operate at the target power.

[0183] Step S121: When both the inlet temperature and the outlet temperature are less than or equal to the preset inlet and outlet temperature thresholds, control the refrigeration device to stop operating.

[0184] Optionally, in this embodiment, the inlet temperature and / or outlet temperature of the liquid cooling pipe in the battery pack can also be used as the switching condition for the cooling device. When the inlet temperature and / or outlet temperature (i.e., either of the two inlet temperatures) is high, the cooling device is controlled to turn on and operate at the target power; when both the inlet and outlet temperatures are low, the cooling device is controlled to turn off.

[0185] Optionally, the inlet and outlet temperatures of the liquid cooling pipe in the battery pack can be obtained by installing a temperature sensor at the inlet and outlet of the liquid cooling pipe in the battery pack.

[0186] Optionally, the inlet and outlet temperature thresholds can be set to the initial temperature of the coolant. When the ambient temperature in the liquid cooling source is higher than this initial temperature value, the refrigeration unit is controlled to operate at a preset target power, and then stops operating after the ambient temperature is reduced to below the ambient temperature threshold.

[0187] Alternatively, the inlet and outlet temperature thresholds can be set slightly lower than the initial temperature of the coolant. For example, if the initial temperature of the coolant is 25°C, then the inlet and outlet temperature thresholds would be 24°C.

[0188] In the technical solution provided in this embodiment, a refrigeration device is set in the liquid cooling source to ensure that the temperature of the returning coolant remains stable, and two selectable temperature values ​​at different locations are provided as the switching conditions for the refrigeration device, thereby ensuring the cooling effect of the coolant in the distributor of the temperature control device.

[0189] Furthermore, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the shunt to implement the process steps of the embodiments of the above methods.

[0190] Therefore, the present invention also provides a computer-readable storage medium storing a heat dissipation control program for a shunt, wherein when the heat dissipation control program for the shunt is executed by a processor, it implements the various steps of the heat dissipation control method for the shunt as described in the above embodiments.

[0191] The computer-readable storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0192] It should be noted that, since the storage medium provided in the embodiments of this application is the storage medium used to implement the methods of the embodiments of this application, those skilled in the art can understand the specific structure and variations of the storage medium based on the methods described in the embodiments of this application, and therefore will not be repeated here. All storage media used in the methods of the embodiments of this application fall within the scope of protection of this application.

[0193] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0194] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0195] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0196] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0197] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0198] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0199] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A heat dissipation control method for a shunt, characterized in that, The distributor includes a liquid cooling pipe and a liquid cooling source, forming a liquid cooling circuit between the liquid cooling pipe and the liquid cooling source. The coolant from the liquid cooling source flows through the liquid cooling circuit, through the distributor, and through the battery pack monitored by the distributor. An electronic valve is installed at the outlet of the liquid cooling source. The battery pack and the distributor are staggered. The liquid cooling pipe includes a first pipe and a second pipe. The electronic valve includes a first valve and a second valve. The heat dissipation control method of the distributor includes the following steps: Obtain the temperature value of the shunt; When the temperature value of the distributor is greater than the preset temperature threshold, the target opening degree of the electronic valve is determined based on the temperature value of the distributor. Obtain the temperature value of the battery pack; Determine the temperature difference between the temperature value of the shunt and the temperature value of the battery pack; Based on the temperature difference, determine the thermal balance value between the shunt and the battery pack; When the thermal balance value is within a preset thermal balance range, controlling the opening of the electronic valve to adjust to the target opening includes: acquiring the ambient temperature of the battery pack; when the ambient temperature is greater than a first preset ambient temperature threshold, controlling the opening of the first valve to adjust to the target opening, so that the coolant in the liquid cooling source flows through the first pipe, first through the battery pack and then through the distributor; when the ambient temperature is less than a second preset ambient temperature threshold, controlling the opening of the second valve to adjust to the target opening, so that the coolant in the liquid cooling source flows through the second pipe, first through the distributor and then through the battery pack. Otherwise, the opening degree of the electronic valve is controlled based on a preset thermal balance adjustment strategy.

2. The heat dissipation control method for the shunt as described in claim 1, characterized in that, The step of determining the target opening degree of the electronic valve based on the temperature value of the distributor includes: Determine the temperature difference between the temperature value of the shunt and the preset temperature threshold. The target opening degree of the electronic valve is determined based on the temperature difference between the temperature value of the shunt and the preset temperature threshold, wherein the absolute value of the temperature difference is positively correlated with the target opening degree.

3. The heat dissipation control method for the shunt as described in claim 2, characterized in that, Determining the target opening degree of the electronic valve based on the temperature difference between the temperature value of the shunt and the preset temperature threshold includes: Determine whether the absolute value of the temperature difference between the current temperature value of the shunt and the preset temperature threshold is greater than the preset temperature difference threshold. If so, the maximum opening degree corresponding to the electronic valve is determined as the target opening degree; Otherwise, determine the temperature difference range between the temperature value of the distributor and the preset temperature threshold, and determine the preset opening value corresponding to the temperature difference range as the target opening.

4. The heat dissipation control method for the shunt as described in claim 1, characterized in that, The control of the opening degree of the electronic valve based on the preset thermal balance adjustment strategy includes the following steps: Based on the heat balance value, determine the valve closing time corresponding to the electronic valve; The control parameters of the electronic valve are determined based on the valve closing time. The electronic valve is controlled to operate according to the control parameters so that the electronic valve returns to its opening degree before closing after the valve closing time.

5. The heat dissipation control method for the shunt as described in claim 1, characterized in that, The step of controlling the opening degree of the electronic valve to the target opening degree includes: Obtain a preset opening increment, and adjust the current opening of the electronic valve according to the preset opening increment until the current opening of the electronic valve is adjusted to the target opening; or, Obtain a preset adjustment rate, and adjust the current opening of the electronic valve to the target opening according to the preset adjustment rate.

6. The heat dissipation control method for a shunt as described in claim 1, characterized in that, The liquid cooling source includes a refrigeration device, and the coolant in the liquid cooling source flows back to the liquid cooling source through the liquid cooling circuit. The heat dissipation control method of the distributor further includes: Obtain the inlet temperature of the liquid cooling pipe. When the inlet water temperature is greater than the preset inlet water temperature threshold, the refrigeration device is controlled to operate at the target power. When the inlet water temperature is less than or equal to the preset inlet water temperature threshold, the refrigeration device is controlled to stop operating; Alternatively, obtain the inlet temperature and / or outlet temperature of the liquid cooling pipe in the battery pack; When the inlet temperature and / or the outlet temperature are greater than the preset inlet and outlet temperature thresholds, the refrigeration device is controlled to operate at the target power. When both the inlet temperature and the outlet temperature are less than or equal to the preset inlet and outlet temperature thresholds, the refrigeration device is controlled to stop operating.

7. A shunt, characterized in that, The shunt includes: a memory, a processor, and a shunt heat dissipation control program stored in the memory and executable on the processor. When the shunt heat dissipation control program is executed by the processor, it implements the steps of the shunt heat dissipation control method as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a heat dissipation control program for the shunt, which, when executed by a processor, implements the steps of the heat dissipation control method for the shunt as described in any one of claims 1 to 6.

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